Anson m



(ModeL) A. M. HOWARD.

110,243,903. v I Patented July 5,1881.

Z v v 2.

WITNESSES: v INVENTORE ATTORNEYS.

UNITED I STATES PATENT OFFICE.

ANSON M. HOWARD, OF ENFIELD, MASSACHUSETTS.

VISE.

SPECIFICATION forming part of Letters Patent No. 243,903, dated July 5,1881.

Application filed January 15, 1881.

To all whom it may concern:

screw, as hereinafter described and claimed.

In the drawings, Figure 1 is a side elevation of a vise containing myimprovements, and Fig. 2 is a rear elevation of the same.

Similar letters of reference indicate corresponding parts.

A is a table, the side a of which forms the fixed jaw of the vise. b isthe screw working in thejaw a, and c is the moving jaw carried by thescrew. These parts are of the usual construction.

The guidearm d of the jaw 0 extends, as usual, through an aperture injaw a and is formed as a rack on its upper side. On the rear end ofscrew 1) is a loose collar, 6, and to this collar a rack-bar,-f, is hungby one end, such barfextendingbeneath the screw through (Model thejaw c,the rack f is moved endwise,and-

acts through the pinious to give a corresponding movement to rackf. Thescrew thus acts on both ends of jaw c at once, and parallel movement isinsured. w

This mechanism is simple and not liable to get out of order. The partscan be readily applied to ordinary screw-Vises, the collar 0 put onthevise-screw and secured by a set-screw tapped into the end of the screw,and the rackbar (1 substituted for the usual plain bar.

Having thus described my invention, I claim as new and desire to secureby Letters Patent In vises, the combination, with the fixedjaw a, screw1), and movable jaw c, of the rack-bars df, collar 0, plate g, andpinions h h, as and for the purpose described.

AN SON MERBIOK HOVARD.

Witnesses E. G. WELLs, E. W. LINooLN.

